She also responded to her friend, Lonnell Williams, after he tweeted, "There are still more of us seeking light than fear of the dark." Winfrey wrote back, "yesterday I turned off the news. Sat and prayed for Paris and US ALL." She also added the hashtag, #WeAreParis.

.@3LWTV yesterday I turned off the news. Sat and prayed for Paris and US ALL. #WeAreParis

Winfrey is one of many celebrities who've taken to social media to share their thoughts and prayers following the tragedy in the French capital. Many stars, including Justin Bieber, Harry Styles and John Legend, have shared the "Peace for Paris" symbol designed by French designer Jean Jullien in the wake of the heartbreaking attacks.

As ET previously reported, the President of France, Francois Hollande, declared a state of emergency on Friday after a series of shootings and explosions began at multiple sites throughout the city, including the Stade de France and Bataclan concert hall. More than 100 people have died and at least 400 were injured in the terror attacks that ISIS has since claimed responsibility for and Hollande called “an act of war.”